[#boost-urls-ipv4_address]
= xref:boost.adoc[boost]::xref:boost/urls.adoc[urls]::ipv4_address
:relfileprefix: ../../
:mrdocs:


An IP version 4 style address.

== Synopsis


Declared in `<https://www.github.com/boostorg/url/blob/develop/include/boost/url/ipv4_address.hpp#L53[boost/url/ipv4_address.hpp]>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
class ipv4_address;
----

== Types

[cols=2]
|===
| Name | Description 

| xref:boost/urls/ipv4_address/bytes_type.adoc[`bytes_type`] 
| The type used to represent an address as an array of bytes

| xref:boost/urls/ipv4_address/uint_type.adoc[`uint_type`] 
| The type used to represent an address as an unsigned integer

|===
== Member Functions

[cols=2]
|===
| Name | Description 

| xref:boost/urls/ipv4_address/2constructor.adoc[`ipv4_address`]         [.small]#[constructor]#
| Construct from a string.

Construct from an array of bytes.

Construct from an unsigned integer.

Constructor.


| xref:boost/urls/ipv4_address/is_loopback.adoc[`is_loopback`] 
| Return true if the address is a loopback address

| xref:boost/urls/ipv4_address/is_multicast.adoc[`is_multicast`] 
| Return true if the address is a multicast address

| xref:boost/urls/ipv4_address/is_unspecified.adoc[`is_unspecified`] 
| Return true if the address is unspecified

| xref:boost/urls/ipv4_address/operator_assign.adoc[`operator=`] 
| Copy Assignment.

| xref:boost/urls/ipv4_address/to_buffer.adoc[`to_buffer`] 
| Write a dotted decimal string representing the address to a buffer

| xref:boost/urls/ipv4_address/to_bytes.adoc[`to_bytes`] 
| Return the address as bytes, in network byte order.

| xref:boost/urls/ipv4_address/to_string.adoc[`to_string`] 
| Return the address as a string in dotted decimal format

| xref:boost/urls/ipv4_address/to_uint.adoc[`to_uint`] 
| Return the address as an unsigned integer.

|===
== Static Member Functions

[cols=2]
|===
| Name | Description 

| xref:boost/urls/ipv4_address/any.adoc[`any`] 
| Return an address object that represents any address

| xref:boost/urls/ipv4_address/broadcast.adoc[`broadcast`] 
| Return an address object that represents the broadcast address

| xref:boost/urls/ipv4_address/loopback.adoc[`loopback`] 
| Return an address object that represents the loopback address

|===
== Static Data Members

[cols=2]
|===
| Name | Description 

| xref:boost/urls/ipv4_address/max_str_len.adoc[`max_str_len`] 
| The number of characters in the longest possible IPv4 string.

|===
== Friends

[cols=2]
|===
| Name | Description 

| xref:boost/urls/ipv4_address/08friend-08.adoc[`operator!=`] 
| Return true if two addresses are not equal

| xref:boost/urls/ipv4_address/08friend-07.adoc[`operator<<`] 
| Format the address to an output stream.

| xref:boost/urls/ipv4_address/08friend-01.adoc[`operator==`] 
| Return true if two addresses are equal

|===



== Description


Objects of this type are used to construct,    parse, and manipulate IP version 6 addresses.


=== BNF

[,cpp]
----
IPv4address = dec-octet "." dec-octet "." dec-octet "." dec-octet

dec-octet   = DIGIT                 ; 0-9
            / %x31-39 DIGIT         ; 10-99
            / "1" 2DIGIT            ; 100-199
            / "2" %x30-34 DIGIT     ; 200-249
            / "25" %x30-35          ; 250-255
----

=== Specification

* link:https://en.wikipedia.org/wiki/IPv4[IPv4 (Wikipedia)]
    
* link:https://datatracker.ietf.org/doc/html/rfc3986#section-3.2.2[3.2.2. Host (rfc3986)]



== See Also


xref:boost/urls/parse_ipv4_address.adoc[parse_ipv4_address],        xref:boost/urls/ipv6_address.adoc[ipv6_address].






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